Thermodynamic balance in quantum dot lasers
Thermodynamic balance in quantum dot lasers
复制标题
量子点激光器的热力学平衡
DOI：
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发表时间：
2001
期刊：
影响因子：
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通讯作者：
M. Hopkinson
中科院分区：
文献类型：
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作者：
H. Summers;J. D. Thomson;P. Smowton;P. Blood;M. Hopkinson
在相同的工作条件下，分别测量了InGaAs量子点激光器的自发辐射和光增益谱。利用这些光谱，实验确定了描述导带和价带电子占有率的综合概率分布函数。将该函数与基于费米-狄拉克统计的理论曲线进行了比较，结果表明，当温度降至100K时，载流子占有率统计可以用温度分布准确地描述。在70K下的测量表明，非热载流子分布表明热力学平衡破裂。
The spontaneous emission and optical gain spectra from an InGaAs quantum dot laser have been independently measured under the same operating conditions. Using these spectra a combined probability-distribution function describing the electron occupancy in the conduction and valence bands has been experimentally determined. Comparison of this function with theoretical curves based on Fermi-Dirac statistics shows that for temperatures down to 100 K the carrier occupancy statistics are accurately described by thermal distributions. Measurements at 70 K show a breakdown of thermodynamic equilibrium indicated by non-thermal carrier distributions.